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Finding the Third Proportional to 331.17 and 515.32

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Solution

The third proportional to 331.17 and 515.32 is: 801.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.17 : 515.32 = 515.32 : x
  2. Step 2: Convert to fraction form
    331.17/515.32 = 515.32/x
  3. Step 3: Cross multiply
    331.17x = 515.32 × 515.32
  4. Step 4: Simplify right side
    331.17x = 265,555.02
  5. Step 5: Solve for x
    x = 265,555.02/331.17
  6. Step 6: Final answer
    x = 801.86

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.